Crystallization and preliminary X-ray crystallographic analysis of quinolinate phosphoribosyltransferase from porcine kidney in complex with nicotinate mononucleotide.

ABSTRACT: Quinolinate phosphoribosyltransferase (QAPRTase) is a key enzyme in NAD biosynthesis; it catalyzes the formation of nicotinate mononucleotide (NAMN) from quinolinate and 5-phosphoribosyl-1-pyrophosphate. In order to elucidate the mechanism of NAMN biosynthesis, crystals of Sus scrofa QAPRTase (Ss-QAPRTase) purified from porcine kidney in complex with NAMN were obtained and diffraction data were collected and processed to 2.1?Å resolution. The Ss-QAPRTase-NAMN cocrystals belonged to space group P321, with unit-cell parameters a=119.1, b=119.1, c=93.7?Å, ?=120.0°. The Matthews coefficient and the solvent content were estimated as 3.10?Å3 Da(-1) and 60.3%, respectively, assuming the presence of two molecules in the asymmetric unit.

SUBMITTER: Youn HS 

PROVIDER: S-EPMC3509970 | biostudies-literature | 2012 Dec

REPOSITORIES: biostudies-literature